求《木兰诗》，《观沧海》，《关雎》，《蒹葭》的背景资料，英文的，最好不要有太难的词，感激不尽！！

"木兰诗" wrote a glorious image of the art. We do not have the true story as the story to research. However, some researchers have to work this time and place of research, we generally agree with: it changes even after the Tong Yan San, but I shoul